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Monica vs 1Key: catalog facts
Monica	1Key
Free Free and open source under the GPL-3.0-only license.	Free Free and open source under GPL-3.0-or-later.
Android	Android
Stores passwords and sensitive records in an encrypted local vault Includes autofill, passkeys, and TOTP/HOTP codes	Stores TOTP codes with their associated credentials Can autofill logins in apps and browsers
Android only Passkey creation may not work on some Xiaomi HyperOS devices	Android only No cloud sync
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: GPL-3.0-or-later
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.